Ubuntu/Debian: Update for 4Kn
I tested this on Ubuntu.
Richard Laager
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7833828315
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cffdb36aa1
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@ -6,6 +6,7 @@
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### System Requirements
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* [64-bit Debian GNU/Linux Stretch Live CD](http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/)
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* [A 64-bit kernel is *strongly* encouraged.](https://github.com/zfsonlinux/zfs/wiki/FAQ#32-bit-vs-64-bit-systems)
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* Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) only works with UEFI booting. This not unique to ZFS. [GRUB does not and will not work on 4Kn with legacy (BIOS) booting.](http://savannah.gnu.org/bugs/?46700)
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Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted.
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@ -58,12 +59,12 @@ If you have a second system, using SSH to access the target system can be conven
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2.2 Partition your disk(s):
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Run this if you need legacy (BIOS) booting:
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# sgdisk -a1 -n1:40:2047 -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1
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# sgdisk -a1 -n1:24K:+1000K -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1
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Run this for UEFI booting (for use now or in the future):
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# sgdisk -n2:1M:+512M -t2:EF00 /dev/disk/by-id/scsi-SATA_disk1
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Run these in all cases:
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Run this in all cases:
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# sgdisk -n4:0:0 -t4:BF01 /dev/disk/by-id/scsi-SATA_disk1
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Always use the long `/dev/disk/by-id/*` aliases with ZFS. Using the `/dev/sd*` device nodes directly can cause sporadic import failures, especially on systems that have more than one storage pool.
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@ -255,7 +256,7 @@ Install GRUB to the disk(s), not the partition(s).
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4.7b Install GRUB for UEFI booting
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# apt install dosfstools
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# mkdosfs -F 32 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2
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# mkdosfs -F 32 -s 1 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2
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# mkdir /boot/efi
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# echo PARTUUID=$(blkid -s PARTUUID -o value \
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/dev/disk/by-id/scsi-SATA_disk1-part2) \
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@ -263,6 +264,8 @@ Install GRUB to the disk(s), not the partition(s).
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# mount /boot/efi
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# apt install --yes grub-efi-amd64
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* The `-s 1` for `mkdosfs` is only necessary for drives which present 4 KiB logical sectors (“4Kn” drives) to meet the minimum cluster size (given the partition size of 512 MiB) for FAT32. It also works fine on drives which present 512 B sectors.
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4.7 Set a root password
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# passwd
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@ -5,7 +5,7 @@
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### System Requirements
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* [Ubuntu 18.04.2 ("Bionic") Desktop CD](http://releases.ubuntu.com/18.04/ubuntu-18.04.2-desktop-amd64.iso) (*not* any server images)
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* A drive which presents 512B logical sectors. Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) should work with UEFI partitioning, but this has not been tested.
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* Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) only works with UEFI booting. This not unique to ZFS. [GRUB does not and will not work on 4Kn with legacy (BIOS) booting.](http://savannah.gnu.org/bugs/?46700)
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Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted.
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@ -62,7 +62,7 @@ If you have a second system, using SSH to access the target system can be conven
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2.2 Partition your disk(s):
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Run this if you need legacy (BIOS) booting:
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# sgdisk -a1 -n1:40:2047 -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1
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# sgdisk -a1 -n1:24K:+1000K -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1
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Run this for UEFI booting (for use now or in the future):
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# sgdisk -n2:1M:+512M -t2:EF00 /dev/disk/by-id/scsi-SATA_disk1
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@ -325,7 +325,7 @@ Install GRUB to the disk(s), not the partition(s).
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4.8b Install GRUB for UEFI booting
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# apt install dosfstools
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# mkdosfs -F 32 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2
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# mkdosfs -F 32 -s 1 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2
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# mkdir /boot/efi
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# echo PARTUUID=$(blkid -s PARTUUID -o value \
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/dev/disk/by-id/scsi-SATA_disk1-part2) \
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@ -333,6 +333,8 @@ Install GRUB to the disk(s), not the partition(s).
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# mount /boot/efi
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# apt install --yes grub-efi-amd64-signed shim-signed
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* The `-s 1` for `mkdosfs` is only necessary for drives which present 4 KiB logical sectors (“4Kn” drives) to meet the minimum cluster size (given the partition size of 512 MiB) for FAT32. It also works fine on drives which present 512 B sectors.
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4.9 Setup system groups:
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# addgroup --system lpadmin
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